@@ -8,4+8,8 @@ The latest drm code from FreeBSD 9.x current has been successfully imported into

We are talking about modern graphics card drivers that have already or are in the process of being written for Linux. Fortunately for the BSDs the source code that is the basis of these drivers, part hosted in git repositories accessible from [freedesktop.org](http://cgit.freedesktop.org/), and even the part that is now residing in the Linux kernel, is mostly licensed under terms compatible with the [MIT X License](http://www.opensource.org/licenses/mit-license.php), and therefore can be directly ported to DragonFly.

-When we refer to DRM, we are referring to the [Direct Render Manager](http://dri.freedesktop.org/wiki/DRM) that is a kernel module arbitrating requests for various graphics related services. Because of this acronym, the source code for DragonFly's DRM module can be found in directory **sys/dev/drm**, while the source code for Linux'd DRM module has been split into **include/drm** hosting common header files and **drivers/gpu/drm**. Furthermore the Linux files have had vendor specific code split off into their own separate directories.

+When we refer to DRM, we are referring to the [Direct Render Manager](http://dri.freedesktop.org/wiki/DRM) that is a kernel module arbitrating requests for various graphics related services. Because of this acronym, the source code for DragonFly's DRM module can be found in directory **sys/dev/drm**, while the source code for Linux'd DRM module has been split into **include/drm** hosting common header files and **drivers/gpu/drm**. Furthermore the Linux files have had vendor specific code split off into their own separate directories, a change the BSDs should consider since having all files in one directory is becoming rather unwieldy.

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+## Previous work makes the port possible

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+Simply take a diff of the FreeBSD and DragonFlyBSD versions of DRM and one can readily see that the hard work of translating the semantics of the locking for the Linux drivers has mostly been done, and better still can be done almost automatically. The FreeBSD port represents the limits of what can be ported having worked out exclusive access mechanisms, but not having completely worked out equivalents of other Linux APIs such as **idr**, small integer ID management.